型钢高性能纤维增强水泥基复合材料剪力墙非线性有限元分析
doi: 10.13204/j.gyjz201508032
NOLINEAR FINITE ELEMENT ANALYSIS OF STEEL HPFRCC SHEAR WALLS
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摘要: 以型钢高性能混凝土剪力墙试验研究为基础,利用有限元软件ABAQUS,考虑材料非线性,对型钢HPFRCC剪力墙构件的加载全过程进行数值模拟,其结果与试验结果吻合较好。根据该有限元模型,分析型钢混凝土剪力墙中采用高强度高延性的高性能纤维增强水泥基复合材料(HPFRCC)替代混凝土后的性能特点。结果表明:在抗剪钢筋和约束钢筋相同的情况下,型钢HPFRCC剪力墙可明显提高剪力墙的抗震能力及耐损伤能力,减小震后修复费用;对于塑性铰区采用HPFRCC的型钢HPFRCC-混凝土组合剪力墙,塑性铰高度较大时,型钢HPFRCC-混凝土剪力墙的变形能力较好,但其范围有临界值,超过临界值,再增大HPFRCC的范围,剪力墙的变形能力不再增大。
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关键词:
- 高性能纤维增强水泥基复合材料 /
- 剪力墙 /
- 非线性有限元分析 /
- 变形能力
Abstract: Based on experiments for steel high performance reinforced concrete ( SHPRC) structural walls and considered the material nonlinearity,nonlinear finite element analysis models of steel HPFRCC shear walls were established by ABAQUS to simulate the complete process of the loading. The finite element analysis results were in good agreement with the experimental results. According to the finite element models,the performance of SHPRC walls was studied after replacement of concrete with HPFRCC of high strength and high ductility. The analysis results showed that steel HPFRCC shear walls could significantly improve the seismic ability as well as the ability to reduce the damage with the same shear reinforcement and confining reinforcement,so the post-earthquake restoration costs were reduced. For HPFRCC or concrete shear walls using HPFRCC in plastic hinge region,the deformation capacity was improved as the plastic hinge height increased,but its scope had a critical value. When the plastic hinge height exceeded the critical value,deformation capacity of shear walls no longer increased.
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